In order to meet the tight design requirement of space remotesensing camera it is necessary to investigate the complex variation of the- concentricity and optical path difference in the optical system due to temperature

gravitation and random excitation. Different schemes of the camera structures have been analysed and compared by means of Computer-Aided Engineering Analyses. Displacements and deformations of the camera structure

due to the effects of temperature and gravitation

have been calculated separately and the variation of the concentricity and optical path difference in the optical system is given. The dynamic response RMS under random excitation spectrum is estimated. By several design-analysis iteration the optimum scheme and structure have-been obtained.